you’re probably experiencing REM behavioral disorder. Don’t worry it’s quite normal. The dream could be taking place because you’ve been thinking alot about your teeth, either because of toothaches or cosmetic issues or the like. Your best recourse is likely to drink lots of milk, which would solve both the cosmetic and pain issues.
Personally, I don’t think there is anything wrong with it. That is, if you dont mind burning in gehinom forever and ever. Music affects our neshama in a very unique way and I cant understand why you would be willing to compromise even slightly with he most important thing in the world!